title: Photoluminescence of a Te4+ center in zinc borate glass.
abstract: Photoluminescent (PL) properties related to Te(4+) species in zinc borate glasses are examined. Broad emission was observed by the excitation of the PL excitation peak of Te(4+) present at the optical absorption edge. The emission intensity of Te(4+) in 5TeO(2)-50ZnO-45B(2)O(3) glass was thermally quenched in a temperature region over 100 K, suggesting that concentration quenching preferentially occurred. The lifetime of the emission was approximately 2.5 μs, which is characteristic of relaxation from the triplet excitation state of an ns(2)-type center.
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Masai
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Yamada
authors.forename: Shun
authors.initials: S
authors.lastname: Okumura
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Kanemitsu
authors.forename: Toshinobu
authors.initials: T
authors.lastname: Yoko